Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
  • A61K8/40—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing nitrogen
  • A61K8/44—Aminocarboxylic acids or derivatives thereof, e.g. aminocarboxylic acids containing sulfur; Salts; Esters or N-acylated derivatives thereof
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
  • A61K8/81—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
  • A61Q17/00—Barrier preparations; Preparations brought into direct contact with the skin for affording protection against external influences, e.g. sunlight, X-rays or other harmful rays, corrosive materials, bacteria or insect stings
  • A61Q17/04—Topical preparations for affording protection against sunlight or other radiation; Topical sun tanning preparations
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
  • A61Q19/00—Preparations for care of the skin
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
  • A61Q5/00—Preparations for care of the hair
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
  • A61Q9/00—Preparations for removing hair or for aiding hair removal
  • A61Q9/02—Shaving preparations

Definitions

• the present invention relates to a composition containing (A): an acyl basic amino acid derivative and (B): an anionic water-soluble polymer, which is used as, for example, cosmetics.
• Thickeners such as anionic water-soluble polymer and the like are used for cosmetics to enhance usability, stability and the like and to prevent dripping.
• acrylic water-soluble polymers such as carboxyvinyl polymer and the like have high thickening property, cause less stimulation, are superior in transparency, and afford good sense of use with less stickiness, they are widely used for thickening the base of a wide range of compositions for skincare, haircare and the like.
• acrylic water-soluble polymers are thickened by neutralization, the thickening property is shown in a limited pH range, and expected viscosity may not be afforded at a desired pH.
• acrylic water-soluble polymers are known to show a marked decrease in the viscosity when they are co-present with electrolytes such as salt and the like (non-patent document 1).
• the hydration of the acrylic water-soluble polymer becomes unstable, which in turn often causes aggregation and decrease in the viscosity.
• R a and R b are each a hydrogen atom or an alkyl group, and n is an integer of 0 to 12, or a salt thereof (hereinafter to be also referred to as “lauroyl amino acid derivative”) is useful for gelation or solidifying water and a liquid organic medium (patent document 2, non-patent document 2 and non-patent document 3 etc.).
• the lauroyl amino acid derivative blended in cosmetics is expected to improve affinity to the skin, as well as exhibit moisturizing ability. Therefore, incorporation of lauroyl amino acid derivatives in cosmetics has been studied.
• liquid cosmetics such as skin lotion, milky lotion and the like
• usability is problematically limited since water is separated (syneresis) with time even though gel may be formed once, aggregates are non-uniformly formed in an acidic range, and the like,.
• Patent Document 1 JP-A-2005-120056
• Patent Document 2 JP-A-2004-323505
• Non-Patent Document 1 water-soluble polymer technique and market of environment-adaptable polymers, CMC Publishing Co., Ltd. (1992), 124-127
• Non-Patent Document 2 Org. Biomol. Chem., 2003, 1, 4124-4131
• Non-Patent Document 3 New J. Chem., 2005, 29, 1439-1444
• An object of the present invention is to provide a composition, which suppresses syneresis and aggregation over time caused by a lauroyl amino acid derivative, maintains desired viscosity in a wide pH range even in the presence of electrolyte or alcohol, and shows good usability by suppressing stickiness and sliminess.
• the present invention provides the following.
• R 1 and R 2 are each independently an alkyl group having 5-21 carbon atoms or an alkenyl group having 5-21 carbon atoms,
• R 3 and R 4 are each independently a hydrogen atom, an alkyl group having 1-22 carbon atoms or an alkenyl group having 2-22 carbon atoms,
• z is an integer of not less than 0,
• x and y are each independently an integer of 2-4, or a salt thereof, and
• component (B) an anionic water-soluble polymer.
• each symbol is as defined in [1], or a salt thereof, and component (B): an anionic water-soluble polymer.
• a composition which suppresses syneresis and aggregation over time, maintains desired viscosity in a wide pH range even in the presence of electrolyte or alcohol, and shows good usability by suppressing stickiness and sliminess can be provided.
• composition of the present invention is characterized in that it is a composition containing component (A): a compound represented by the formula (1)
• R 1 and R 2 are each independently an alkyl group having 5-21 carbon atoms or an alkenyl group having 5-21 carbon atoms,
• R 3 and R 4 are each independently a hydrogen atom, an alkyl group having 1-22 carbon atoms or an alkenyl group having 2-22 carbon atoms,
• z is an integer of not less than 0,
• x and y are each independently an integer of 2-4, or a salt thereof, and
• component (B) an anionic water-soluble polymer.
• composition of the present invention is characterized in that it is a composition further containing component (C): electrolyte or component (D): alcohol in addition to component (A) and component (B).
• R 1 and R 2 are each independently an alkyl group having 5-21 carbon atoms or an alkenyl group having 5-21 carbon atoms.
• the alkyl group having 5-21 carbon atoms means a straight-chain or branched-chain alkyl group having 5-21 carbon atoms. Specific examples thereof include pentyl group, isopentyl group, neopentyl group, a hexyl group, isohexyl group, neohexyl group, heptyl group, isoheptyl group, neoheptyl group, octyl group, isooctyl group, nonyl group, isononyl group, decyl group, isodecyl group, undecyl group, dodecyl group, tridecyl group, tetradecyl group, pentadecyl group, hexadecyl group, heptadecyl group, octadecyl group, nonadecyl group, icosyl group and the like.
• the alkenyl group having 5-21 carbon atoms means a straight-chain or branched-chain alkenyl group having 5-21 carbon atoms. Specific examples thereof include pentenyl group, hexenyl group, heptenyl group, octenyl group, nonenyl group, decenyl group, undecenyl group, dodecenyl group, tridecenyl group, tetradecenyl group, pentadecenyl group, hexadecenyl group, heptadecenyl group, octadecenyl group, nonadecenyl group, icosenyl group and the like.
• alkyl group having 5-15 carbon atoms means a straight-chain or branched-chain alkyl group having 5-15 carbon atoms. Specific examples thereof include pentyl group, a hexyl group, heptyl group, octyl group, nonyl group, decyl group, undecyl group, dodecyl group, tridecyl group, tetradecyl group, pentadecyl group and the like.
• alkyl group having 7-11 carbon atoms means a straight-chain or branched-chain alkyl group having 7-11 carbon atoms. Specific examples thereof include heptyl group, octyl group, nonyl group, decyl group, undecyl group and the like.
• R 1 and R 2 are preferably each independently an alkyl group having 5-15 carbon atoms, more preferably each independently an alkyl group having 7-11 carbon atoms.
• R 1 and R 2 are each a straight chain alkyl group. Furthermore, R 1 and R 2 are preferably the same.
• R 3 and R 4 are each independently a hydrogen atom, an alkyl group having 1-22 carbon atoms or an alkenyl group having 2-22 carbon atoms.
• An alkyl group having 1-22 carbon atoms means a straight-chain or branched-chain alkyl group having 1-22 carbon atoms. Specific examples thereof include methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, an isobutyl group, a sec-butyl group, a tert-butyl group, a pentyl group, isopentyl group, neopentyl group, a hexyl group, isohexyl group, neohexyl group, heptyl group, isoheptyl group, neoheptyl group, octyl group, isooctyl group, nonyl group, isononyl group, decyl group, isodecyl group, undecyl group, dodecyl group, tridecyl group, tetradecyl group, pentade
• alkenyl group having 2-22 carbon atoms means a straight-chain or branched-chain alkenyl group having 2-22 carbon atoms. Specific examples thereof include ethenyl group, 1-propenyl group, 2-propenyl group, 1-butenyl group, 2-butenyl group, 3-butenyl group, pentenyl group, hexenyl group, heptenyl group, octenyl group, nonenyl group, decenyl group, undecenyl group, dodecenyl group, tridecenyl group; tetradecenyl group, pentadecenyl group, hexadecenyl group, heptadecenyl group, octadecenyl group, nonadecenyl group, icosenyl group and the like.
• both R 3 and R 4 are hydrogen atoms.
• z is an integer of not less than 0.
• z is preferably an integer of 0-10, more preferably 7 or 8.
• x and y are each independently an integer of 2-4.
• x and y are each preferably 4.
• R 1 and R 2 are each independently a straight-chain alkyl group having 5-15 carbon atoms
• R 3 and R 4 are each a hydrogen atom
• z is an integer of 0-10
• x and y are each 4.
• R 1 and R 2 are each a straight chain alkyl group having 5-15 carbon atoms
• R 3 and R 4 are each a hydrogen atom
• z 7 or 8
• x and y are each 4.
• R 1 and R 2 are each a straight chain alkyl group having 7-11 carbon atoms
• R 3 and R 4 are each a hydrogen atom
• z 7 or 8
• x and y are each 4.
• the salt of the compound represented by the formula (1) is not particularly limited.
• examples thereof include alkali metal salts such as sodium salt, potassium salt and the like, alkaline earth metal salts such as calcium salt, magnesium salt and the like, inorganic salts such as aluminum salt, salt with zinc and the like, and organic salts such as organic amine salts such as ammonium salt, monoethanolamine salt, diethanolamine salt, triethanolamine salt and the like, basic amino acid salts such as arginine salt, lysine salt and the like, and the like.
• alkali metal salts such as sodium salt, potassium salt and the like
• alkaline earth metal salts such as calcium salt, magnesium salt and the like
• inorganic salts such as aluminum salt, salt with zinc and the like
• organic salts such as organic amine salts such as ammonium salt, monoethanolamine salt, diethanolamine salt, triethanolamine salt and the like
• basic amino acid salts such as arginine salt, lysine salt and the like, and the like.
• Compound (1) can be produced by a method conventional method (JP-A-2004-323505, Org. Biomol. Chem., 2003, 1, 4124-4131, New J. Chem., 2005, 29, 1439-1444 etc.).
• symmetrical compound (1′) can be produced by reacting N ⁇ -acyl amino acid (2) and dicarboxylic acid dichloride (3) in an appropriate solvent.
• R 1′ is an alkyl group having 5-21 carbon atoms or an alkenyl group having 5-21 carbon atoms
• R 3′ is a hydrogen atom, an alkyl group having 1-22 carbon atoms or an alkenyl group having 2-22 carbon atoms
• z′ is an integer of not less than
• x′ is an integer of 2-4.
• dicarboxylic acid dichloride (3) examples include oxalyl chloride, malonyl chloride, succinyl chloride, glutaryl chloride, adipoyl chloride, pimeloyl chloride, suberoyl chloride, azelaoyl chloride, sebacoyl chloride, dodecanedioyl chloride and the like.
• the amount of dicarboxylic acid dichloride (3) to be used is generally 0.4-0.6 equivalent relative to N ⁇ -acyl amino acid (2).
• the solvent is not particularly limited as long as it is inert to the reaction, examples thereof include ethers such as diethyl ether, tetrahydrofuran and the like.
• asymmetric compound (1′′) can be produced as follows. First, N 107 -acyl amino acid (2) and dicarboxylic acid monochloride monoester (4) are reacted in an appropriate solvent to give compound (5) (step 1).
• the primary ester moiety of the obtained compound (5) is hydrolyzed in the presence of a base such as sodium hydroxide, potassium hydroxide and the like, the carboxylic acid moiety is chlorinated with a chlorinating agent such as thionyl chloride and the like, and the compound is reacted with N ⁇ -acyl amino acid (2′) which is different from N ⁇ -acyl amino acid (2) used in the aforementioned step 1 (step 2), whereby derivative (1′′) can be produced.
• a base such as sodium hydroxide, potassium hydroxide and the like
• a chlorinating agent such as thionyl chloride and the like
• R 1 ′, z′ and x′ are as defined above, R 2 ′ is an alkyl group having 5-21 carbon atoms or an alkenyl group having 5-21 carbon atoms, R 4 ′ is a hydrogen atom, an alkyl group having 1-22 carbon atoms or an alkenyl group having 2-22 carbon atoms, R 5 is an alkyl group such as a methyl group, an ethyl group and the like, and y′ is an integer of 2-4.
• dicarboxylic acid monochloride monoester (4) a commercially available product can be used as is when it is commercially available, or one produced by a method known per se or a method analogous thereto can also be used.
• the acyl basic amino acid derivative obtained by the aforementioned method can be converted to a salt of acyl basic amino acid derivative by a reaction with alkali metal hydroxide such as sodium hydroxide, potassium hydroxide and the like, alkali earth metal hydroxide such as calcium hydroxide and the like, organic amine base, or the like.
• alkali metal hydroxide such as sodium hydroxide, potassium hydroxide and the like
• alkali earth metal hydroxide such as calcium hydroxide and the like
• organic amine base or the like.
• component (A): acyl basic amino acid derivative or a salt thereof in the composition of the present invention is generally 0.001-10 wt %, preferably 0.005-5 wt %, relative to the total amount of the composition.
• the “anionic water-soluble polymer” means a negatively-charged water-soluble polymer. While the “anionic water-soluble polymer” is not particularly limited as long as it is a negatively-charged water-soluble polymer, it preferably has a carboxyl group in a molecule from the aspect of usability.
• anionic water-soluble polymer examples include carboxyvinyl polymer, polyacrylic acid or a salt thereof, crosslinked polyacrylic acid or a salt thereof, (acrylic acid/(C10-30)alkyl acrylate) copolymer, alkyl acrylate copolymer fluid, (acrylates/alkyl acrylate) crosspolymer, (hydroxyethyl acrylate/sodium acryloyl dimethyl taurine) copolymer, carboxymethylcellulose or a salt thereof, xanthan gum, and alginic acid or a salt thereof and the like.
• Examples of the salt of the anionic water-soluble polymer include salts similar to those exemplified as the salt of the aforementioned compound represented by the formula (1).
• the anionic water-soluble polymer may be used alone or two or more kinds thereof may be used in a mixture.
• component (B): an anionic water-soluble polymer in the composition of the present invention is generally 0.05-10 wt %, preferably 0.05-5 wt %, relative to the total amount of the composition.
• the weight of component (A)/weight of component (B) in the composition of the present invention is generally 1/99-99/1, preferably 1/4-4/1.
• composition of the present invention is generally viscous liquid, gel, cream, stick and the like, preferably viscous liquid, gel, cream and the like.
• the “electrolyte” means a substance that dissociates into cation and anion when dissolved in a solvent, and shows conductivity.
• Specific examples of the “electrolyte” include sodium chloride, potassium chloride, magnesium chloride, calcium chloride, magnesium sulfate, aluminum sulfate/potassium, sodium pyrrolidone carboxylate, sodium lactate, potassium lactate, sodium ascorbate, sodium salicylate, sodium isethionate and the like.
• the content of component (C): electrolyte in the composition of the present invention is generally 0.01-20 wt %, preferably 0.05-5 wt %, relative to the total amount of the composition.
• the “alcohol” in the present specification is preferably a straight-chain or branched-chain alcohol having 1-6 carbon atoms.
• Specific preferable examples of the “alcohol” include methanol, ethanol, propanol, isopropanol, butanol, isobutanol, sec-butanol, tert-butanol, pentanol, hexanol and the like, and more preferred are ethanol, propanol and isopropanol.
• the content of component (D): alcohol in the composition of the present invention is generally 3-80 wt % relative to the total amount of the composition, and preferably 10-65 wt % relative to the total amount of the composition.
• pH of the composition of the present invention is not particularly limited, it is generally pH 3-9, preferably pH 4-7.5, from the aspect of the maintenance of the thickening property.
• the present invention also relates to a cosmetic containing the aforementioned composition of the present invention.
• cosmetic in the present invention examples include facial cleanser, skin lotion, milky lotion, cream, gel, serum, facial mask, mask, soap, body shampoo, face powder, foundation, lip rouge, blush, eyeliner, mascara, eye shadow, eyebrow pencil, shampoo, rinse, conditioner, hair styling agent, hair treatment and the like.
• the cosmetics of the present invention may contain components that can be generally added to a cosmetics, as long as the effect of the present invention is not inhibited.
• Specific examples thereof include oil, chelating agent, surfactant, powder, amino acids, polyvalent alcohol, polyamino acid and salt thereof, water-soluble polymer, sugar alcohol and alkylene oxide adduct thereof, lower alcohol, animal and plant extract, nucleic acid, vitamin, enzyme, anti-inflammatory agent, antimicrobial agent, preservative, antioxidant, ultraviolet absorber, adiaphoretic, pigment, dye, oxidation dye, organic and inorganic powder, pH adjuster, pearly sheen agent and wetting agent.
• the present invention also relates to a method of producing a composition with improved viscosity stability, comprising a step of adding component (A): compound (1) or a salt thereof to component (B): an anionic water-soluble polymer.
• “with improved viscosity stability” means that the composition was improved to maintain viscosity in a wide pH range even in the presence of electrolyte or alcohol.
• the wide pH range refers to pH 4-8, and the viscosity of the composition of the present invention generally means a viscosity requested by the use or kind of the composition.
• component (A) compound (1) or a salt thereof, one produced by the method described in the present specification, as well as the methods described in patent document 2, non-patent document 2 and non-patent document 3 can be used.
• component (B) an anionic water-soluble polymer, a commercially available product can be used.
• the present invention also relates to a method of suppressing syneresis or aggregation of a composition, comprising a step of adding component (B): an anionic water-soluble polymer to component (A): compound (1) or a salt thereof.
• Syneresis means separation of water from the composition, and aggregation means change from a uniform state to a non-uniform state.
• the above-mentioned addition method can be performed according to a conventional method.
• the amount to be added and specific components are as described above.
• the present invention also relates to a method of stabilizing viscosity of a composition, comprising a step of adding component (A): compound (1) or a salt thereof to component (B): an anionic water-soluble polymer in the presence of electrolyte or alcohol.
• component (A): compound (1) or a salt thereof to component (B): an anionic water-soluble polymer in the presence of electrolyte or alcohol.
• the addition method can be performed according to a conventional method.
• the amount to be added and specific components are as described above.
• N ⁇ -lauroyl-L-lysine (8.2 g, 25 mmol) was dissolved in water (70 g) and 25% aqueous sodium hydroxide solution (10 g), and diethyl ether (80 g) was added. Sebacoyl chloride (3.3 g, 14 mmol) was slowly added to the ether layer. The two-layer solution was stirred for about 1 hr while maintaining at 0° C., and then at room temperature for 23 hr. Then, 75% sulfuric acid was added dropwise to adjust to pH 2, the obtained white precipitate was collected by filtration, washed well with water and dried. The obtained compound was dissolved in an aqueous sodium hydroxide solution to give a 10% aqueous bis(N ⁇ -lauroyl-L-lysine)sebacoyl amide disodium salt solution.
• N ⁇ -lauroyl-L-lysine (8.2 g, 25 mmol) was dissolved in water (70 g) and 25% aqueous sodium hydroxide solution (10 g), and diethyl ether (80 g) was added. Sebacoyl chloride (3.3 g, 14 mmol) was slowly added to the ether layer. The two-layer solution was stirred for about 1 hr while maintaining at 0° C., and then at room temperature for 23 hr. Then, 75% sulfuric acid was added dropwise to adjust to pH 2, the obtained white precipitate was collected by filtration, washed well with water and dried. The obtained compound was added to water, and the mixture was adjusted to pH 10 with triethanolamine to give a 10% aqueous bis(N ⁇ -lauroyl-L-lysine)sebacoyl amide ditriethanolamine salt solution.
• N ⁇ -octanoyl-L-lysine (6.8 g, 25 mmol) was dissolved in water (70 g) and 25% aqueous sodium hydroxide solution (10 g), and diethyl ether (80 g) was added.
• Sebacoyl chloride (3.3 g, 14 mmol) was slowly added to the ether layer. The two-layer solution was stirred for about 1 hr while maintaining at 0° C., and then at room temperature for 23 hr. Then, 75% sulfuric acid was added dropwise to adjust to pH 2, the obtained white precipitate was collected by filtration, washed well with water and dried.
• the obtained compound was dissolved in an aqueous sodium hydroxide solution to give a 10% aqueous bis(N ⁇ -octanoyl-L-lysine)sebacoyl amide disodium salt solution.
• composition of the present invention The syneresis and aggregation suppressive effect of the composition of the present invention was evaluated.
• the preparation of the composition, evaluation method and evaluation criteria are as follows.
• Component (A) (compound synthesized in Production Example 1) was added to component (B) dispersed in water by stirring in advance, and the mixture was stirred at room temperature (wt % of each component is described in Table 1). The obtained mixture was divided into two, and the pH was adjusted to pH 4.8 and pH 5.5. The prepared composition was completely sealed tightly in a 30 mL glass bottle, and preserved at room temperature for not less than 5 days.
• the glass bottle containing the composition (pH 5.5) prepared as mentioned above was placed upside down, visually observed and evaluated according to the following criteria.
• composition (pH 4.8) prepared as mentioned above was visually observed and evaluated according to the following criteria.
• Comparative Example 1 In Comparative Example without addition of component (B), water was separated from the composition, and aggregation occurred (Comparative Example 1). On the other hand, water was not separated from the composition of the present invention added with component (B), and aggregation was suppressed (Example 1).
• the viscosity and usability of the composition of the present invention at each pH in the presence of electrolyte or alcohol were evaluated.
• the preparation of the composition, evaluation method and evaluation criteria are as follows.
• Component (A) (compound synthesized in Production Examples 1 and 3) was added to component (B) dispersed in water by stirring in advance, component (C) (electrolyte) (sodium pyrrolidone carboxylate (50% aqueous solution); AJIDEW NL-50 (manufactured by Ajinomoto Co., Inc.)) was added, and the mixture was stirred at room temperature (wt % of each component is described in Table 2). The obtained mixture was divided into four, and the pH was adjusted to pH 4.8, pH 5.5, pH 6.5 and pH 7.5. The prepared test compositions were filled and completely sealed tightly in a 30 mL glass bottle, and preserved at room temperature for 5 to 8 days.
• each composition was prepared, and preserved at room temperature for 5 to 8 days.
• Component (A) (compound synthesized in Production Example 2) was added to a mixture of component (B) dispersed in water by stirring in advance and component (D) (alcohol), and the mixture was stirred well at room temperature (wt % of each component is described in Table 3). The obtained mixture was divided into four, and the pH was adjusted to pH 4.8, pH 5.5, pH 6.5 and pH 7.5 by adding those recited in the item of pH adjust in the Table. The prepared test compositions were filled and completely sealed tightly in a 30 mL glass bottle, and preserved at room temperature for 5 to 8 days.
• each composition was prepared, and preserved at room temperature for 5 to 8 days.
• the glass bottle filled with the composition (pH 5.5) prepared and preserved as mentioned above was placed upside down, visually observed and evaluated according to the following criteria.
• compositions (25-35 mg) prepared as mentioned above (pH 5.5) were applied to the skin within the range of 8 ⁇ 2 cm on the inner side of the forearm of the test subjects, and the presence of stickiness during or immediately after the application was examined, and evaluated according to the following criteria.
• compositions (25-35 mg) prepared as mentioned above (pH 5.5) were applied to the skin within the range of 8 ⁇ 2 cm on the inner side of the forearm of the test subjects, and the presence of sliminess during or immediately after the application was examined, and evaluated according to the following criteria.
• Example 2 3 4 5 6 7 8 component (A) compound of Production Example 1 2.0 2.0 2.0 2.0 1.0 0.5 — (as 10% aqueous solution) compound of Production Example 3 — — — — — — — 1.0 (as 10% aqueous solution) component (B) carboxyvinyl polymer 0.2 — — — — — 0.2 polyacrylic acid — 0.2 — — 0.2 0.2 — (acrylic acid/(C10-30)alkyl — — 0.2 — — — — acrylate) copolymer alkyl acrylate copolymer fluid — — — 0.2 — — pH adjustment citric acid 3Na 0.1 0.1 0.1 0.1 0.1 0.1 citric acid q.s.
• Comparative Examples without addition of component (A) were inferior in the sense of use during application, since sufficient viscosity was not achieved when the amount of component (B) was suppressed to focus on the sense of use (Comparative Examples 2-5, 9 and 10), and stickiness and sliminess were produced when the amount of component (B) was increased to supplement viscosity (Comparative Examples 6-8).
• the compositions of the present invention added with component (A) could maintain thickening property in a wide pH range, and decreased stickiness and sliminess (Examples 2-18).
• a moisturizing gel of the formulation shown in the following Table 4 was prepared according to a conventional method.
• a hand sanitizer of the formulation shown in the following Table 5 was prepared according to a conventional method.
• a hair tonic of the formulation shown in the following Table 6 was prepared according to a conventional method.
• a spray sunscreen of the formulation shown in the following Table 7 was prepared according to a conventional method.
• An after-shave gel of the formulation shown in the following Table 8 was prepared according to a conventional method.
• Blending Examples 1-5 showed sufficient viscosity, and suppressed stickiness and sliminess.
• the present invention can provide a composition which suppresses syneresis and aggregation over time, maintains desired viscosity in a wide pH range even in the presence of electrolyte or alcohol, and suppresses stickiness and sliminess.

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• 2015
  • 2015-12-25 EP EP15873263.6A patent/EP3238699B1/en active Active
  • 2015-12-25 JP JP2016566505A patent/JP6686903B2/ja active Active
  • 2015-12-25 WO PCT/JP2015/086212 patent/WO2016104695A1/ja active Application Filing
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  • 2017-06-23 US US15/631,883 patent/US20170281496A1/en not_active Abandoned

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